Mobile Telephone

1. A handset comprising: a data-input touch pen unit for data input on a touch panel of a mobile telephone; a communication unit for near-field wireless communication with the mobile telephone; an audio output unit for output of an audio signal received by the communication unit; an audio input unit for input of an audio signal transmitted from the communication unit; and an adjusting means, wherein the audio output unit includes a cartilage conduction unit, the adjusting means operable to adjust intensity of vibration of the cartilage conduction unit at least between a first intensity and a second intensity, the handset operable to generate air-conduction sound whose volume changes as the intensity of the vibration changes, and the first intensity is an intensity sufficient to generate air-conduction sound with a volume required in a measurement method conforming to a standard for a common mobile telephone.

2. The handset according to claim 1 , further comprising: an incoming-call notifying unit.

3. The handset according to claim 1 , further comprising: an incoming-call notifying unit, and wherein the cartilage conduction unit also serves as the incoming-call notifying unit.

4. The handset according to claim 1 , further comprising: a display unit that displays an identification of the call destination.

5. The handset according to claim 4 , wherein the handset has a flat shape, and the display unit can display text that identifies the call destination, and is provided on a the flat face of the flat shape.

6. The handset according to claim 1 , further comprising: a call destination storage unit, and wherein through selection by a touch with the data-input touch pen unit, call destination data is received from the mobile telephone via the communication unit, and is stored in the call destination storage unit.

7. The handset according to claim 1 , wherein the handset is operable in a configuration in which, when the touch panel of the mobile telephone is in a power-saving state, the audio output unit and the audio input unit are in an enabled state.

8. The handset according to claim 7 , wherein the handset is operable in a configuration in which, when the touch panel of the mobile telephone is in a state capable of accepting input, the audio output unit and the audio input unit are disused.

9. The handset according to claim 1 , wherein the handset is operable in a configuration in which, when the mobile telephone is in a videophone session, the audio output unit and the audio input unit are in an enabled state.

10. The handset according to claim 1 , wherein the second intensity is an intensity insufficient to generate air-conduction sound with the volume required in the measurement method conforming to the standard for a common mobile telephone, the second intensity being such that a sound pressure inside an external auditory meatus as measured with the mobile telephone in contact with an ear cartilage with the vibration at the second intensity is higher than a sound pressure inside the external auditory meatus as measured with the mobile telephone out of contact with, but close to, an entrance of the external auditory meatus with the vibration at the first intensity.